Bedstead and like joint



Oct. 20, 1925.

. W. BACHMANN BEDSTEAD AND LIKE JOI" Filed Dec. ,'50, 1922 /n ren/on .ZOU

Patented Oct. 20, 1925.

UNITED STATES WILHELM BACHMANN, GF ZUR-IGH., SWITZERLAND.

:BEDSTEAD arm LIKE :ro-INT.

Application filed December 30, 1922. Serial No. 610,009.

To all whom it may concern.'

Be it known that I, VILHELM BAGHMANN, a citizen of the Swiss Republic, residing at Zurich, Switzerland, have invented certain Improvements in Bedstead and like Joints, of which the following is a specification.

For connecting parts of furniture and the like, for instance the rails and pillars of bedsteads, at right angles to each other, it has been proposed to employ a cylindrical casing which is either secured to the wood by means of a separate screw or provided with its own screw-thread so that it can be driven into a recess in the wood, the casing being provided with a face plate having a keyhole aperture whereby it can interlock with a headed stud connected to the end of the bed rail or the like. It has also been proposed to employ.l instead of the casing, merely a slotted shield which is normally bent and formed with points adapted to enter the wood when the shield is straightened inside a recess. Another known fastening for the permanent connection of elements at right angles, consists of a plate which is bent over the end of a rail which is driven into arecess in another element, the ends of the plate being pointed and set against the rail so as to enter it when the latter is driven home, while a bent and pointed bar is guided transversely in slots in the plate so as to be driven into the walls 0f the recess when the bar is straightened out owing to its abutment against the bottom of the recess.

This invention relates to a fastening for the detachable connection of elements at right angles, and its object is to produce a simple device which can be readily fitted in position and firmly secured without the employment of screws. This object is achieved according to the invention by the combination with a circular casing having a face plate formed with a keyhole aperture, of a normally bent, transverse bar which is guided in slots in the casing so that it can be knocked straight for securing the casing in position after the latter has been inserted in a recess in the wood.

Fig. 'l of the drawings represents a side view of the device, and

Fig. 2, a section of the same.

Fig. 3 is a sectional view showing the casing in use, and

Fig. 1, a. front view of Fig. 3.

The device is composed of a cylindrical `casing b which is fitted ina recess e in a bed pillar f or the like. An angular bar 7Ly is normally held by its pointed ends e', in diametrically opposed slots in the casing wall. After the casing has been introduced into its recess, the knee of the bar is forced down from the front by means of a punch or a chisel so as to straighten the bar. The ends z' will then be guided transversely into the wood, as shown in Fig. 3, so as to secure Vthe casing permanently in position. An annular groove g is drilled into the wood at the bottom of the recess for accommodating the part of the casing which projects beyond the bar 7L. Thus the latter, when straightened, can be forced right up against the bottom of the recess, and the edge of the casing will be prevented by the groove from inward displacenient which would weaken lthe anchoring effect of the bar.

The bar z` is shouldered, as shown in Fig. 4, so as to limit its extension through the cass ing and ensure equal engagement at both ends.

The front end of the casing carries a shield a having a key-hole aperture for interlocking with a headed stud o connected to the opposite element, say, the rail of a bedstead. The wide part Z of the aperture admits the head m into the casing, and the narrow part 7c, which finally receives the stud, locks it in position.

The device may be used in connection with other elements than bedsteads, for instance a lock casing may be secured to a door in the same manner as the casing Z9 to the pillar l. ln a bedstead or like joint, the combination with a wooden bedstead element having a circular recess and an annular groove of the same outside diameter as the recess made at the bottom of the latter, of a cylindrical metal casing adapted to fit said recess and to engage said annular groove, a bar held in diametrically opposite slots in the casing wall, said bar being normally bent outwards so that it can be driven into the surrounding wood by straightening it against the bottom of the recess, and shoulders formed on said bar at some distance from the ends thereof, so that they will engage and be stopped by the casing wall when the bar is thus straightcned.

2. In a bedstead or like joint, the combination with a wooden bedstead element having Circular recess and an annular groove llO 3 having;` e key-hole aperture und forming of the saune outside diameter us the reeess made at the bottoni of the latter, of a cylindrical inet-i1 Casing adapted to fit said recess and to engage said annular groove, a shield th vfront of the Casin?, u bar heldin diametriezilly opposite slots in the Casing Wall said bur being normally bent outwards so that it can be driven into the surrounding Wood by straightening it against the bottom of thel recess, shoulders formed on said bar at son/ie distance from the ends thereof so that theirv will engage und be stopped by the casing Wall when the bar is thus straightened, and u headed stud adapted for Connection to another bedstead element and for engagement with said shield.

VILHELM BACHMANN. 

